Discharge unit and electric power apparatus
A discharge unit of an embodiment includes a drain pan, a discharge portion having an insulation property, a grounded drain piping, and a liquid separation part having an insulation property. The drain pan receives a liquid. The discharge portion is connected to the drain pan and drains the liquid remaining in the drain pan. The liquid separation part prevents the liquid from flowing continuously between the discharge portion and the drain piping.
1. An electric power apparatus, comprising:
a discharge unit;
an apparatus housing on which the discharge unit is provided;
an electrical device that is housed in the apparatus housing; and
a cooling unit that is provided in the apparatus housing and cools the electrical device by a liquid refrigerant;
wherein the discharge unit comprises:
a drain pan that receives a liquid;
a discharge portion that has an insulation property, is connected to the drain pan, and drains the liquid remaining in the drain pan;
a grounded drain piping;
a liquid separation part that has an insulation property and prevents the liquid from flowing continuously between the discharge portion and the drain piping; and
a valve that is provided on the drain piping and opens and closes an inside of the drain piping;
wherein the electrical device is disposed directly on the drain pan without ensuring insulation,
the drain pan is charged to a potential of the electrical device,
the liquid separation part comprises a discharge housing that has an insulation property and includes a discharge connection portion to which the discharge portion is connected and a piping connection portion to which the drain piping is connected, and
the valve opens the drain piping in at least one of a case in which an amount of the liquid accumulated in the discharge housing exceeds a predetermined threshold value, a case in which a flow rate of the liquid refrigerant is less than a predetermined threshold value, and a case in which a predetermined time elapses.
2. The discharge unit according to claim 1 ,
wherein the discharge connection portion is arranged at a predetermined interval in a gravity direction above the piping connection portion.
3. The discharge unit according to claim 2 ,
wherein the discharge portion includes a hose that has an insulation property, connects the drain pan to the discharge housing, and has an inside through which the liquid flows, and
an end portion on a side of the discharge housing of the hose protrudes from an inner wall of the discharge housing toward an inside of the discharge housing.